Printed circuit and printed circuit of touch panel

ABSTRACT

A printed circuit includes a number of conductive wires. Each of the conductive wires includes a first conductive wire section, a second conductive wire section, and a first connection section. The first connection section includes a first end and a second end opposite to the first end, the first end of the first connection section is connected to the first conductive wire section, and the second end of the first connection section is connected to the second conductive wire section. An angle between the first conductive wire section and the first connection section can be in a range from about 90 degrees to about 180 degrees.

RELATED APPLICATIONS

This application claims all benefits accruing under 35 U.S.C. §119 fromTaiwan Patent Application No. 101100112, filed on Jan. 2, 2012 in theTaiwan Intellectual Property Office, the disclosure of which isincorporated herein by reference.

BACKGROUND

1. Technical Field

The present application relates to a printed circuit and particularly aprinted circuit for a touch panel.

2. Discussion of Related Art

For faster printing speeds and lower cost, the screen printing techniqueis widely used in printing circuits. As line width and space between twoadjacent lines of a printed circuit become increasingly smaller, theyields of the printed circuit may significantly decrease. FIG. 6 andFIG. 7 illustrate printed circuits including a plurality of tracks ortraces with corners of right angles or rounded corners. In the actualprocess for making the printed circuits as shown in FIG. 6 or FIG. 7,the screen will also include multiple right angles or rounded corners.When silver colloid is applied through the right angles or roundedcorners on the screen during making the printed circuits as shown inFIG. 6 or FIG. 7, the silver colloid may spill over the edges of thescreen which will result in two adjacent tracks short circuiting.Manufacturing yields of the printed circuits are significantly reducedbecause of spilling of the silver colloid over the edges of the screen.

What is needed, therefore, is to provide a printed circuit and a printedcircuit of a touch panel which can overcome the shortcomings asdescribed above.

BRIEF DESCRIPTION OF THE DRAWINGS

Many aspects of the embodiments can be better understood with referenceto the following drawings. The components in the drawings are notnecessarily drawn to scale, the emphasis instead being placed uponclearly illustrating the principles of the embodiments. Moreover, in thedrawings, like reference numerals designate corresponding partsthroughout the several views.

FIG. 1 is a schematic view showing a structure of one embodiment of aprinted circuit of a touch panel.

FIG. 2 is a schematic, enlarged view of circled portion II of theprinted circuit in FIG. 1.

FIG. 3 is a schematic, enlarged view of circled portion III of theprinted circuit in FIG. 1.

FIG. 4 is a schematic view showing a structure of another embodiment ofa printed circuit of a touch panel.

FIG. 5 is a schematic, enlarged view of circled portion V of the printedcircuit in FIG. 4.

FIG. 6 is a schematic view showing a structure of a printed circuit ofprior art in one corner.

FIG. 7 is a schematic view showing another structure of a printedcircuit of prior art in one corner.

DETAILED DESCRIPTION

The disclosure is illustrated by way of example and not by way oflimitation in the figures of the accompanying drawings in which likereferences indicate similar elements. It should be noted that referencesto “an” or “one” embodiment in this disclosure are not necessarily tothe same embodiment, and such references mean “at least one.”

Referring to FIG. 1, a printed circuit 10 of a touch panel of oneembodiment includes a plurality of conductive wires 16. The touch panelincludes a substrate 12, a transparent conductive layer 14, and aplurality of electrodes 18.

The transparent conductive layer 14, the plurality of conductive wires16, and the plurality of electrodes 18 are located on a surface of thesubstrate 12. The transparent conductive layer 14 is located on thesurface of the substrate 12. The transparent conductive layer 14includes a first side 142 and a second side 144 opposite to and parallelto the first side 142. The plurality of electrodes 18 are outside thefirst and the second sides 142 and 144 of the transparent conductivelayer 14. The plurality of electrodes 18 are spaced from each other andelectrically connected with the transparent conductive layer 14. Theplurality of electrodes 18 located on the first side 142 of thetransparent conductive layer 14 are spaced from each other andelectrically connected to the transparent conductive layer 14. Theplurality of electrodes 18 located on the second side 144 of thetransparent conductive layer 14 are spaced from each other andelectrically connected to the transparent conductive layer 14. Each ofthe plurality of electrodes 18 on the first side 142 of the transparentconductive layer 14 matches one of the plurality of electrodes 18 on thesecond side 144 of the transparent conductive layer 14.

The plurality of conductive wires 16 can be divided into two partsaccording to the location. The first part of the plurality of conductivewires 16 is located adjacent to the first side 142 of the transparentconductive layer 14. The second part of the plurality of conductivewires 16 is located adjacent to the second side 144 of the conductivelayer 14. One end of the first part of the plurality of conductive wires16 is connected to one of the plurality of electrodes 18, the other endof the first part of the plurality of conductive wires 16 is connectedto an external circuitry 22. One end of the second part of the pluralityof conductive wires 16 is connected to one of the plurality ofelectrodes 18, the other end of the second part of the plurality ofconductive wires 16 is connected to the external circuitry 22. The firstpart of the plurality of conductive wires 16 is parallel to each other.The second part of the plurality of conductive wires 16 is parallel toeach other and spaced from each other. Each of the plurality ofconductive wires 16 is electrically independent and insulated from eachother. There is a distance between every adjacent two of the pluralityof conductive wires 16. A width of each of the plurality of conductivewires 16 can be in a range from about 50 microns to about 200 microns.The transparent conductive layer 14 receives connections to the externalcircuitry 22 by the plurality of electrodes 18 and the plurality ofconductive wires 16.

In operation, the external circuitry 22 provides driving signals to thetransparent conductive layer 14 via the plurality of conductive wires 16and the plurality of electrodes 18. When the transparent conductivelayer 14 is touched by a finger or by a conductive material, aconductive or capacitive path is formed between the transparentconductive layer 14 and the finger or conductive material. Theconduction or capacitance is transmitted to the external circuitry bythe plurality of conductive wires 16 and the plurality of electrodes 18,and a location of the finger or the conductive material can be sensed.

The plurality of conductive wires 16 can be made by a method such asscreen printing. The plurality of conductive wires 16 can be made ofconductive material such as a metal, or a conductive silver paste.

The distribution of the plurality of conductive wires 16 locatedadjacent to the first side 142 of the transparent conductive layer 14,is the same as the distribution of the plurality of conductive wires 16located adjacent to the second side 144 of the transparent conductivelayer 14. The plurality of conductive wires 16 located adjacent to thefirst side 142 of the transparent conductive layer 14 are described forexemplary purposes. Each of the plurality of conductive wires 16includes at least two corners. In one embodiment, the two corners arelabeled as circled portion II and circled portion III.

Referring to FIG. 2, each of the plurality of conductive wires 16includes a first conductive wire section 162, a second conductive wiresection 166, a first connection section 164, and a second connectionsection 168.

In circled portion II, the first conductive wire section 162 isconnected to the second conductive wire section 166 by the firstconnection section 164. Each of the first conductive wire sections 162is parallel to each other. Each of the second conductive wire section166 is also parallel to each other. There is an angle between anextending line of the first conductive wire section 162 and an extendingline of the second conductive wire section 166. The angle can be in arange from about 0 degrees to about 180 degrees. Each of the firstconnection section 164 is in a straight line and parallel to each other.There is an angle between the first conductive wire section 162 and thefirst connection section 164, and the angle is defined as a. There is anangle between the second conductive wire section 166 and the firstconnection section 164, and the angle is defined as β. The angles α andβ are located at each end of the first connection section 164. Theangles α and β can be in a range from about 90 degrees to about 180degrees. In one embodiment, the angles α and β are in a range from about120 degrees to about 150 degrees. In one embodiment, the angles α and βare in a range from about 130 to about 140 degrees.

In one embodiment, the extending line of the first conductive wiresection 162 is perpendicular to the extending line of the secondconductive wire section 166. A distance between any adjacent two of thefirst connection sections 164 can be equal or unequal. In oneembodiment, the distance between any adjacent two of the firstconnection sections 164 is equal and defined as D. A distance betweenadjacent two of the first conductive wire sections 162 is defined as d,which is the same distance as that between adjacent two of the secondconductive wire sections 166. The distance d can be in a range fromabout 50 microns to about 200 microns.

The first conductive wire section 162 includes a first end and a secondend opposite to the first end. The first end of the first conductivewire section 162 is connected to the first connection section 164. Thesecond conductive wire section 166 includes a first end and a second endopposite to the first end. The first end of the second conductive wiresection 166 is connected to the other end of the first connectionsection 164.

In each adjacent two of the plurality of conductive wires 16, a distancebetween the first end of the first conductive wire section 162 far awayfrom the first side 142 and an orthographic projection of the first endof the first conductive wire section 162 close to the first side 142 isdefined as Δd₁, wherein the orthographic projection is on the firstconductive wire section 162 far away from the first side 142. In eachadjacent two of the plurality of conductive wires 16, a distance betweenthe first end of the second conductive wire section 166 far away fromthe first side 142 and an orthographic projection of the first end ofthe second conductive wire section 166 close to the first side 142 isdefined as Δd₂, wherein the orthographic projection is on the secondconductive wire section 166 far away from the first side 142. Therefore,the distance between adjacent two of the first connection sections 164is larger than the distance between adjacent two of the first conductivewire sections 162. The distance between adjacent two of the firstconnection sections 164 is similarly larger than the distance betweenadjacent two of the second conductive wire sections 166. D is largerthan d. This achieves the result that any short circuiting between theadjacent two of the plurality of conductive wires 16 in the circledportion II is almost impossible.

Three of the plurality of conductive wires 16 close to the first side142 of the transparent conductive layer 14 can be taken as an example,these are sequentially named as a conductive wire 161, a conductive wire163, and a conductive wire 165, as shown in FIG. 2. The conductive wire161 is the closest to the first side 142 of the transparent conductivelayer 14.

A distance between the first end of the conductive wire 163 and anorthographic projection of the first end of the first conductive wiresection 162 of the conductive wire 161 on the conductive wire 163 isdefined as Δd₁. A distance between the first end of the conductive wire165 and an orthographic projection of the first end of the firstconductive wire section 162 of the conductive wire 163 on the conductivewire 165 is also defined as Δd₁.

A distance between the first end of the conductive wire 163 and anorthographic projection of the first end of the second conductive wiresection 166 of the conductive wire 161 on the conductive wire 163 isdefined as Δd₂. A distance between the first end of the conductive wire165 and an orthographic projection of the first end of the secondconductive wire section 166 of the conductive wire 163 on the conductivewire 165 is also defined as Δd₂. The distances Δd₁ and Δd₂ can be equalor unequal. In one embodiment, Δd₁, Δd₂ and d are all equal.

The distances between adjacent two of the first connection sections 164meet the condition: D=√{square root over (2)}Δd₁×sin(225°−α). The angleα plus β equals 270 degrees. In one embodiment, the angles α and β are135 degrees. In one embodiment, the angles α and β are equal to 135degrees, Δd₁ and Δd₂ are equal to d. Therefore, the distance betweenadjacent two of the first connection sections 164 meets the condition:D=√{square root over (2)}d. When Δd₁ is larger than d, D is larger than√{square root over (2)}d.

In one embodiment, in the process of printing the printed circuit 10 bya screen printing process, when a silver colloid is applied through theangle α or β, the silver colloid has a smaller impact through thescreen. Therefore, the silver colloid does not readily overflow from thecircled portion II, reducing the likelihood of short circuits. Moreover,the manufacturing yield of such a printed circuit 10 is significantlyincreased.

Referring to FIG. 3, in the circled portion III, each of the secondconnection section 168 includes a first end and a second end opposite tothe first end. The first end of the second connection section 168 iselectrically connected to the second end of the first conductive wiresection 162. The second end of the second connection section 168 iselectrically connected to the plurality of electrodes 18. An anglebetween the second connection section 168 and the first conductive wiresection 162 is defined as γ. The angle γ can be in a range from about 90degrees to about 180 degrees. In one embodiment, the angle γ is in arange from about 120 degrees to about 150 degrees. In anotherembodiment, the angle γ is in a range from about 130 degrees to about140 degrees. In another embodiment, the angle γ is 135 degrees. A widthof the connection section 168 is larger than the width of the firstconductive wire section 162. Therefore, an open circuit phenomenon isless likely to occur between the second connection section 168 and thefirst conductive wire section 162. The yield of the printed circuit 10can be improved. In one embodiment, the width of second connectionsection 168 is in a range from about 50 microns to about 1000 microns.

Referring to FIG. 4 and FIG. 5, a printed circuit 20 of a touch panel ofanother embodiment includes the plurality of conductive wires 16. Theprinted circuit 20 is similar to the printed circuit 10. The differencebetween the printed circuit 20 and the printed circuit 10 is that in theprinted circuit 20, each of the plurality of conductive wires 16includes at least one corner defined as V.

An angle between the first conductive wire section 162 and the firstconnection section 164 is defined as α_(n). An angle between the secondconductive wire section 166 and the first connection section 164 isdefined as β_(n). The angles α_(n) and β_(n) are at either end of thefirst connection section 164. The angles α_(n) and β_(n) can be in arange from about 90 degrees to about 180 degrees. The angles α_(n) andβ_(n) can not both be 180 degrees. The angle α_(n) meets the condition:α_(n)−α_(n)≠0, wherein the letter n represents the number of theplurality of conductive wires 16. The angle β_(n) meets the condition:β_(n)−β_(n-1)≠0, wherein the letter n represents the number of theplurality of conductive wires 16.

In each adjacent two of the plurality of conductive wires 16, a distancebetween the first end of the second conductive wire section 166 far awayfrom the first side 142 and an orthographic projection of the first endof the second conductive wire section 166 close to the first side 142 isdefined as Δd₂, wherein the orthographic projection is on the secondconductive wire section 166 far away from the first side 142. In oneembodiment, the distance Δd₂ is equal to the distance d. The angle α_(n)successively decreases in a direction far away from the first side 142.At the same time, the angle β_(n) successively increases in thedirection far away from the first side 142. The angle α_(n) meets thecondition: α_(n)−α_(n-1)=45°/n−1. The angle β_(n) meets the condition:β_(n-1)−β_(n)=45°/n−1.

In one embodiment, there are nine conductive wires 16. The nineconductive wires 16 are named as conductive wire M₁, conductive wire M₂,conductive wire M₃, conductive wire M₄, conductive wire M₅, conductivewire M₆, conductive wire M₇, conductive wire M₈ and conductive wire M₉.So that, α_(n)−α_(n-1)=45°/9−1=5.625°, and β_(n-1)−β_(n)=45°/9−1=5.625°.

In detail, in the conductive wire M₁, an angle α₁ between the firstconductive wire section 162 and the first connection section 164 isequal to 90 degrees; an angle β₁ between the second conductive wiresection 166 and the first connection section 164 is equal to 180degrees. In the conductive wire M₁, the first conductive wire section162 is perpendicular to the second conductive wire section 166.

In the conductive wire M₂, there is an angle α₂ between the firstconductive wire section 162 and the first connection section 164, andthe angle α₂ meets the equation: α₂=90°+5.625°=95.625°; there is anangle β₂ between the second conductive wire section 166 and the firstconnection section 164, and the angle β₂ meets the equation:β₂=180°−5.625°=174.375°.

In the conductive wire M₃, there is an angle α₃ between the firstconductive wire section 162 and the first connection section 164, andthe angle α₃ meets the equation: α₃=95.625°+5.625°=101.25°; there is anangle β₃ between the second conductive wire section 166 and the firstconnection section 164, and the angle β₃ meets the equation:β₃=174.375°−5.625°=167.75°.

In the conductive wire M₄, there is an angle α₄ between the firstconductive wire section 162 and the first connection section 164, andthe angle α₄ meets the equation: α₄=101.25°+5.625°=106.875°; there is anangle β₄ between the second conductive wire section 166 and the firstconnection section 164, and the angle β₄ meets the equation:β₄=168.75°−5.625°=163.125°.

In the conductive wire M₅, there is an angle α₅ between the firstconductive wire section 162 and the first connection section 164, andthe angle α₅ meets the equation: α₅=106.875°+5.625°=112.5°; there is anangle β₅ between the second conductive wire section 166 and the firstconnection section 164, and the angle β₅ meets the equation:β₅=163.125°−5.625°=157.5°.

In the conductive wire M₆, there is an angle α₆ between the firstconductive wire section 162 and the first connection section 164, andthe angle α₆ meets the equation: α₆=112.5°+5.625°=118.125°; there is anangle β₆ between the second conductive wire section 166 and the firstconnection section 164, and the angle β₆ meets the equation:β₆=157.5°−5.625°=151.875°.

In the conductive wire M₇, there is an angle α₇ between the firstconductive wire section 162 and the first connection section 164, andthe angle α₇ meets the equation: α₇=118.125°+5.625°=123.75°; there is anangle β₇ between the second conductive wire section 166 and the firstconnection section 164, and the angle β₇ meets the equation:β₇=151.875°−5.625°=146.25°.

In the conductive wire M₈, there is an angle α₈ between the firstconductive wire section 162 and the first connection section 164, andthe angle α₈ meets the equation: α₈=123.75°+5.625°=129.375°; there is anangle β₈ between the second conductive wire section 166 and the firstconnection section 164, and the angle β₈ meets the equation:β₈=146.25°−5.625°=140.625°.

In the conductive wire M₉, there is an angle α₉ between the firstconductive wire section 162 and the first connection section 164, andthe angle α₉ meets the equation: α₉=129.375°+5.625°=135°; there is anangle β₉ between the second conductive wire section 166 and the firstconnection section 164, and the angle β₉ meets the equation:β₉=140.625°−5.625°=135°.

Moreover, the angle α_(n) also meets the condition:α_(n-1)−α_(n)=45°/n−1. The angle β_(n) meets a similar condition:β_(n)−β_(n-1)45°/n−1. That is, the angle α_(n) successively increases inthe direction far away from the first side 142. At the same time, theangle β_(n) successively decreases in the direction far away from thefirst side 142.

The angles α_(n) and β_(n) in the circled portion V can be changed usingvarious algorithms, for example, a ratio, a difference value, or morecomplex forms. The angle α_(n) has to be larger than 90 degrees, and theangle β_(n) has to be larger than 90 degrees.

Changing of the angles α_(n) and β_(n) in the circled portion V enablesthe distance between adjacent two of the first connection sections 164in the circled portion V to be larger than the distance between adjacenttwo of the first connection sections 164 in the circled portion II.Therefore, the likelihood of short circuit phenomenon between adjacenttwo of the plurality of conductive wires 16 is further reduced.

The arrangement of the plurality of conductive wires 16 is not limitedto the touch screen only, and other electronic products which includethe printed circuit 10 can also utilize the arrangement of the pluralityof conductive wires 16.

In summary, at least two angles are formed in at least one corner of theplurality of conductive wires 16. In the process of printing the printedcircuits 10 or 20 by the screen printing process, when the silvercolloid is applied through the angles, the silver colloid has a smallerimpact on and through the screen. Therefore, the silver colloid is lesslikely to blur and overflow from the corner, leading adjacent two of theplurality of conductive wires 16 away from short circuiting. Moreover,the distance between adjacent two of the plurality of conductive wires16 can be increased, further preventing the occurrence of a shortcircuit between adjacent two of the plurality of conductive wires 16.Thus, the yield of the printed circuits 10 or 20 can significantlyincrease. In addition, the structure of the printed circuits 10 and 20is simple and easy to implement.

The above-described embodiments are intended to illustrate rather thanto limit the disclosure. Variations may be made to the embodimentwithout departing from the spirit of the disclosure as claimed. Theabove-described embodiments are intended to illustrate the scope of thedisclosure and not to restrict the scope of the disclosure.

The above description and the claims drawn to a method may include someindication in reference to certain steps. However, any such indicationis only for identification purposes and is not to be taken as asuggestion as to an order for the steps.

What is claimed is:
 1. A printed circuit of a touch panel, comprising: aplurality of conductive wires, each of the plurality of conductive wirescomprising a first end and a second end opposite to the first end,wherein the first end is connected to a plurality of electrodes of thetouch panel, the second end is connected to an external circuitry;wherein each of the plurality of conductive wires comprises a firstconductive wire section, a second conductive wire section, and a firstconnection section; the first connection section extends along astraight line; the first connection section comprises a first end and asecond end opposite to the first end of the first connection section,the first end of the first connection section is connected to the firstconductive wire section, the second end of the first connection sectionis connected to the second conductive wire section; the first conductivewire section of each of the plurality of conductive wires is parallel toeach other, the second conductive wire section of each of the pluralityof conductive wires is parallel to each other; an angle between thefirst conductive wire section and the first connection section isdefined as angle α, the angle α is in a range from about 90 degrees toabout 180 degrees; an angle between the second conductive wire sectionand the first connection section is defined as angle β, the angle β isin a range from about 90 degrees to about 180 degrees; the angle α andthe angle β are in a same side of the first connection section.
 2. Theprinted circuit of the touch panel as claimed in claim 1, wherein anextending direction of the first conductive wire section isperpendicular to an extending direction of the second conductive wiresection of at least one of the plurality of conductive wires.
 3. Theprinted circuit of the touch panel as claimed in claim 2, wherein theangle α is in a range from about 120 degrees to about 150 degrees, theangle β is in a range from about 120 degrees to about 150 degrees. 4.The printed circuit of the touch panel as claimed in claim 3, whereinthe angle α is in a range from about 130 degrees to about 140 degrees,the angle β is in a range from about 130 degrees to about 140 degrees.5. The printed circuit of the touch panel as claimed in claim 4, whereinthe angle α is 135 degrees, and the angle β is 135 degrees.
 6. Theprinted circuit of the touch panel as claimed in claim 2, wherein adistance between the first conductive wire sections of adjacent two ofthe plurality of conductive wires is equal to a distance between twosecond conductive wire sections of the adjacent two of the plurality ofconductive wires; the distance between the first conductive wiresections and the distance between the second conductive wire sectionsare defined as d, d is in a range from about 50 microns to about 200microns.
 7. The printed circuit of the touch panel as claimed in claim6, wherein a distance between the first connection sections of theadjacent two of the plurality of conductive wires is defined as D, Dsatisfies a condition of D=√{square root over (2)}d.
 8. The printedcircuit of the touch panel as claimed in claim 1, wherein the each ofthe plurality of conductive wires further comprises a second connectionsection comprising a first end and a second end opposite to the firstend of the second connection section, wherein the first end of thesecond connection section is connected to the first conductive wiresection, the second end of the second connection section is connected toone of the plurality of electrodes; an angle between the secondconnection section and the first conductive wire section is in a rangefrom about 120 degrees to about 150 degrees.
 9. The printed circuit ofthe touch panel as claimed in claim 8, wherein a width of the secondconnection section is in a range from about 50 microns to about 1000microns.
 10. The printed circuit of the touch panel as claimed in claim1, wherein a width of the each of the plurality of conductive wires isin a range from about 50 microns to about 200 microns.
 11. A printedcircuit of a touch panel, comprising: a plurality of conductive wires,each of the plurality of conductive wires comprising a first end and asecond end opposite to the first end, the first end is connected to aplurality of electrodes of the touch panel, the second end is connectedto an external circuitry; wherein each of the plurality of conductivewires comprises a first conductive wire section and a second connectionsection; the second connection section extends along a straight line;the second connection section comprises a first end and a second endopposite to the first end of the second connection section; the firstend of the second connection section is connected to the firstconductive wire section, the second end of the second connection sectionis connected to one of the plurality of electrodes; an angle between thefirst conductive wire section and the second connection section is in arange from about 120 degrees to about 150 degrees.
 12. The printedcircuit of the touch panel as claimed in claim 11, wherein the anglebetween the first conductive wire section and the second connectionsection is in a range from about 130 degrees to about 140 degrees. 13.The printed circuit of the touch panel as claimed in claim 12, whereinthe angle between the first conductive wire section and the secondconnection section is 135 degrees.
 14. The printed circuit of the touchpanel as claimed in claim 11, wherein a width of the second connectionsection is in a range from about 50 microns to about 1000 microns.
 15. Aprinted circuit, comprising: a plurality of conductive wires; whereineach of the plurality of conductive wires comprises a first conductivewire section, a second conductive wire section, and a first connectionsection; the first connection section extends along a straight line; thefirst connection section comprises a first end and a second end oppositeto the first end of the first connection section, the first end of thefirst connection section is connected to the first conductive wiresection, the second end of the first connection section is connected tothe second conductive wire section; the first conductive wire section ofeach of the plurality of conductive wires is parallel to each other, thesecond conductive wire section of each of the plurality of conductivewires is parallel to each other; an angle between the first conductivewire section and the first connection section is defined as angle α, theangle α is in a range from about 90 degrees to about 180 degrees; anangle between the second conductive wire section and the firstconnection section is defined as angle β, the angle β is in a range fromabout 90 degrees to about 180 degrees; the angle α and the angle β arelocated in a same side of the at least one first connection section. 16.The printed circuit as claimed in claim 15, wherein the angle α is 135degrees, and the angle β is 135 degrees.
 17. The printed circuit asclaimed in claim 15, wherein a distance between the first conductivewire sections of adjacent two of the plurality of conductive wires isequal to a distance between the second conductive wire sections ofadjacent two of the plurality of conductive wires; the distance betweenthe first conductive wire sections and the distance between the secondconductive wire sections are defined as d, d is in a range from about 50microns to about 200 microns.
 18. The printed circuit as claimed inclaim 17, wherein a distance between the first connection sections ofadjacent two of the plurality of conductive wires is defined as D, Dsatisfies a condition of D=√{square root over (2)}d.
 19. The printedcircuit as claimed in claim 15, wherein each of the plurality ofconductive wires further comprises a second connection sectioncomprising a first end and a second end opposite to the first end of thesecond connection section; the first end of the second connectionsection is connected to the first conductive wire section, the secondend of the second connection section is connected to one of a pluralityof electrodes; an angle between the second connection section and thefirst conductive wire section is in a range from about 120 degrees toabout 150 degrees.
 20. The printed circuit as claimed in claim 19,wherein a width of the second connection section is larger than a widthof the first conductive wire of at least one of the plurality ofconductive wires.